<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8"/>
    <title>单文件上传</title>
</head>
<body>
<p>单文件上传</p>
<form method="post" enctype="multipart/form-data" action="/upload">
    文件: <input type="file" name="file"/>
    <input type="submit"/>
</form>
</body>
</html>